Proxy Error Meaning, Common Codes and Fixes
A proxy error can come from your proxy, the website behind it or your own browser. See which one sent yours and how to fix a 407, 403, 502 or other code.
Most common proxy errors
- 407
Proxy Authentication Required
The proxy expected credentials or a whitelisted IP and got neither in a form it accepts.
How to fix it - 403
Forbidden
The site or its firewall refused a request it understood, and a VPN or proxy IP can be the reason.
How to fix it - ERR_PROXY_CONNECTION_FAILED
There is something wrong with the proxy server
Chrome could not resolve or connect to the proxy it was set to use.
How to fix it
Errors by type
Proxy and connection errors
- 407
Proxy Authentication Required
How to fix it - Timeout
Proxy timeout
How to fix it - ERR_PROXY_CONNECTION_FAILED
There is something wrong with the proxy server
How to fix it - Firefox
The proxy server is refusing connections
How to fix it - ERR_TUNNEL_CONNECTION_FAILED
A tunnel connection through the proxy could not be established
How to fix it - ERR_SOCKS_CONNECTION_FAILED
The SOCKS proxy connection failed
How to fix it - ERR_NO_SUPPORTED_PROXIES
No supported proxies
How to fix it
- 407
Network errors
- ERR_CONNECTION_REFUSED
Site refused to connect
How to fix it - ERR_CONNECTION_TIMED_OUT
Site took too long to respond
How to fix it - ERR_CONNECTION_RESET
Connection was reset
How to fix it - ERR_CONNECTION_CLOSED
Connection closed unexpectedly
How to fix it - ERR_EMPTY_RESPONSE
Site sent no data
How to fix it - ERR_NAME_NOT_RESOLVED
Server IP address not found
How to fix it - ECONNREFUSED
Connection refused
How to fix it - ETIMEDOUT
Connection timed out
How to fix it - ECONNRESET
Connection reset by peer
How to fix it - socket hang up
Connection closed before a reply
How to fix it - EAI_AGAIN
Temporary DNS failure
How to fix it - EHOSTUNREACH
No route to host
How to fix it
- ERR_CONNECTION_REFUSED
Secure connection errors
- ERR_CERT_AUTHORITY_INVALID
Your connection is not private
How to fix it - ERR_CERT_COMMON_NAME_INVALID
Certificate name does not match
How to fix it - ERR_SSL_PROTOCOL_ERROR
Site sent an invalid response
How to fix it - ERR_HTTP2_PROTOCOL_ERROR
HTTP/2 stream error
How to fix it - CERTIFICATE_VERIFY_FAILED
Certificate verify failed
How to fix it - UNABLE_TO_VERIFY_LEAF_SIGNATURE
Unable to verify the first certificate
How to fix it - SELF_SIGNED_CERT_IN_CHAIN
Self-signed certificate in chain
How to fix it - EPROTO
TLS wrong version number
How to fix it
- ERR_CERT_AUTHORITY_INVALID
Library and script errors
- requests.exceptions.ProxyError
Python requests proxy error
How to fix it - Max retries exceeded
Max retries exceeded with URL
How to fix it - ChunkedEncodingError
Connection broken mid-body
How to fix it - Missing dependencies for SOCKS support
SOCKS support not installed
How to fix it - TypeError: fetch failed
Node.js fetch failed
How to fix it - node-fetch proxy
node-fetch skips the proxy
How to fix it - axios proxy
axios ignores or breaks the proxy
How to fix it
- requests.exceptions.ProxyError
Website and server errors
- 400
Bad Request
How to fix it - 401
Unauthorized
How to fix it - 405
Method Not Allowed
How to fix it - 408
Request Timeout
How to fix it - 421
Misdirected Request
How to fix it - 499
Client Closed Request
How to fix it - 500
Internal Server Error
How to fix it - 502
Bad Gateway
How to fix it - 503
Service Unavailable
How to fix it - 504
Gateway Timeout
How to fix it - 520
Web server is returning an unknown error
How to fix it - 521
Web server is down
How to fix it - 522
Connection timed out
How to fix it - 1003
Direct IP access not allowed
How to fix it
- 400
Website blocks
- 403
Forbidden
How to fix it - 429
Too Many Requests
How to fix it - 451
Unavailable For Legal Reasons
How to fix it - IP ban
Your IP address has been banned
How to fix it - 1005
Access denied: ASN banned
How to fix it - 1015
You are being rate limited
How to fix it - 1020
Access denied
How to fix it - Just a moment...
Cloudflare check that keeps looping
How to fix it - CAPTCHA on every page
A CAPTCHA that keeps coming back
How to fix it - Unusual traffic
Google's unusual traffic page
How to fix it - Access Denied, Reference #
Akamai Access Denied with a reference number
How to fix it
- 403